<template>
  <div>
    <!--  面包屑导航区域  -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!--  卡片视图区域  -->
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>
<!--      表格-->
      <tree-table
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        border
        :show-row-hover="false"
        class="treeTable"
      >
        <template slot="isok" slot-scope="scope">
          <i class="el-icon-success" v-if="scope.row.cat_deleted === false" style="color: lightgreen"></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag type="success" size="mini" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag type="warning" size="mini" v-else>三级</el-tag>
        </template>
        <template slot="opt" slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditCateDialog(scope.row.cat_id)">编辑</el-button>
          <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeCateById(scope.row.cat_id)">删除</el-button>
        </template>
      </tree-table>
<!--      分页-->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total">
      </el-pagination>
    </el-card>
    <el-dialog
      title="添加分类"
      width="50%"
      :visible.sync="addCateDialogVisible"
      @close="addCateDialogClosed"
    >
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef" label-width="100px">
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类：">
<!--          props用来指定配置对象-->
          <el-cascader
            v-model="selectedKeys"
            :options="parentCateList"
            :props="cascaderProps"
            @change="parentCateChanged"
            clearable
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="addCate">确认</el-button>
      </span>
    </el-dialog>
<!--    编辑-->
    <el-dialog
      title="修改分类"
      width="50%"
      :visible.sync="editCateDialogVisible"
    >
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item label="分类名称：" prop="cat_name">
          <el-input v-model="editForm.cat_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editCateDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="editCate">确认</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Cate',
  data () {
    return {
      // 查询条件
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      // 商品分类的数据列表,默认为空
      catelist: [],
      // 总数据
      total: 0,
      addCateDialogVisible: false,
      addCateForm: {
        // 将要添加的分类的名称
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      // 父级分类的列表
      parentCateList: [],
      // 选中的父级分类的数组
      selectedKeys: [],
      editCateDialogVisible: false,
      // editCateForm: {
      //   cate_name: ''
      // },
      // 查询到的用户数据
      editForm: {},
      // 添加分类的校验规则
      addCateFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      editFormRules: {
        cat_name: [
          { required: true, message: '请输入分类名称', trigger: 'blur' }
        ]
      },
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      // 指定级联选择器的配置对象
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        checkStrictly: true
      }
    }
  },
  created () {
    this.getCateList()
  },
  // 获取商品分类数据
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories', { params: this.queryInfo })
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败！')
      }
      this.catelist = res.data.result
      this.total = res.data.total
    },
    handleSizeChange (newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    handleCurrentChange (newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog () {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const { data: res } = await this.$http.get('categories', { params: { type: 2 } })
      if (res.meta.status !== 200) {
        return this.$message.error('获取父级分类列表失败！')
      }
      this.parentCateList = res.data
    },
    parentCateChanged () {
      if (this.selectedKeys.length > 0) {
        // 父级id
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        // 分类等级
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
      console.log(this.selectedKeys)
    },
    addCate () {
      console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败！')
        }
        this.$message.success('添加分类成功！')
      })
      this.getCateList()
      this.addCateDialogVisible = false
    },
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_pid = 0
      this.addCateForm.cat_level = 0
    },
    // 删除操作
    async removeCateById (id) {
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete('categories/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除商品分类失败！')
      }
      this.$message.success('删除商品分类成功！')
      this.getCateList()
    },
    async showEditCateDialog (id) {
      const { data: res } = await this.$http.get('categories/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类信息失败！')
      }
      this.editForm = res.data
      this.$message.success('获取商品分类信息成功！')
      this.editCateDialogVisible = true
    },
    editCate () {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.put('categories/' + this.editForm.cat_id, { cat_name: this.editForm.cat_name })
        if (res.meta.status !== 200) {
          return this.$message.error('编辑商品分类信息失败！')
        }
        this.$message.success('编辑商品分类信息成功！')
        this.getCateList()
        this.editCateDialogVisible = false
      })
    }
  }
}
</script>

<style lang="less" scoped>
.treeTable{
  margin-top: 15px;
}

.el-cascader{
  width: 100%;
}
</style>
